Irenaeus set the church on a path that led to the victory of orthodoxy over alternate expressions of Jesus, culminating in the official approval of the four gospels and the apostolic tradition by Athanasius, the fourth-century champion of orthodoxy. Such a development was aided by the Roman emperor Constantine, whose conversion to Christianity in AD 313 paved the way for the legalizing of Christianity. Using Christianity as the unifying principle for his empire, Constantine convened the bishops of
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